Document of bibliographic reference 23289

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

New species of Oriopsis Caullery and Mesnil from Florida, Belize, and Aldabra Atoll (Seychelles), and a new species of Amphiglena Claparède from Seychelles (Polychaeta: Sabellidae: Sabellinae)

Abstract

Three new species of Oriopsis Caullery and Mesnil, 1896 and a new species of Amphiglena Claparede, 1864 (Polychaeta: Sabellidae: Sabellinae) are described: Oriopsis anneae is described from the Florida Keys (USA), O. androgyne from a barrier reef island of Belize, and O. paramobilis from Aldabra Atoll (Seychelles). Oriopsis anneae is gonochoric, has three pairs of radioles, 8 thoracic chaetigers and up to 12 abdominal chaetigers. Females have a pair of spermathecae, ventrally, at the base of posterior peristomial ring collar. Males have sperm with long nuclei, split into four rods. Oriopsis androgyne is a simultaneous hermaphrodite with three pairs of radioles, 8 thoracic chaetigers and 5 abdominal chaetigers. Mature individuals have oocytes in thoracic chaetigers 5-6 and sperm and spermatids in the following 4 chaetigers. No sperm storage organs were found. Oriopsis paramobilis is gonochoric, has three pairs of radioles, 8 thoracic chaetigers and up to 5 abdominal chaetigers. Females have a pair of spermathecae in the radiolar crown. Males have sperm with long nuclei, and an elongate midpiece. All species of Oriopsis described here have lateral ducts, from sperm-bearing segments, for sperm to exit to the water. Amphiglena nathae, described from two islands of Seychelles, Indian Ocean, has up to 6 pairs of radioles, 8 thoracic chaetigers and up to 25 abdominal chaetigers. This species, like several other species of Amphiglena, is a simultaneous hermaphrodite with oocytes and developing sperm present in the first few abdominal chaetigers. Developing sperm are also present in several chaetigers posterior to oocyte-bearing segments. A pair of spermathecae were found at the base of the dorsal lips. This species broods larvae, each in an egg capsule, until they have 8 thoracic chaetigers when they hatch and swim away.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:A1994NG91900014

Bibliographic citation

Rouse, G.W. (1994). New species of Oriopsis Caullery and Mesnil from Florida, Belize, and Aldabra Atoll (Seychelles), and a new species of Amphiglena Claparède from Seychelles (Polychaeta: Sabellidae: Sabellinae). Bull. Mar. Sci. 54(1): 180-202

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true